Skip to content
  • Soft real-time and QOS (revised)

    [ revised version of an older post] “Soft real-time” is a perfect example of the “soft design” noted in an earlier post. There are perfectly good ways of characterizing quality of service (QOS) assurances precisely. Doug Jenson proposes one possible definition: The general case of a deadline (which is a soft deadline) has utility measured…

    November 20, 2007
  • Free digital content and the daily show

    Video about “free digital content”. [youtube http://www.youtube.com/watch?v=PzRHlpEmr0w&rel=0&color1=0xd6d6d6&color2=0xf0f0f0&border=1]

    November 16, 2007
  • Hollywood writers are smarter than programmers

    The strike in Hollywood is about royalties. The writers, who are used to getting a share of the royalties on their work, want to keep getting royalties on work shown on the internet. The producers are making the claim that since they give away views on YouTube and other internet sites, you know free content,…

    November 8, 2007
  • Sparc T2 (niagra 2)

    UT architecture seminar today was by Greg Grohoski from Sun – an updated version of his Hot Chips talk. I’m not a big fan of this approach to chip architecture: 8 processors, each with 8 threads, but they are working hard on a real problem. The problem is the usual one of high speed processors…

    November 5, 2007
  • OpenBSD developer notes king’s clothing is “virtual”

    Theo de Raadt explains why virtualization does not improve security. How about this: to improve security, you have to have a secure design, a marketing buzzword won’t do the trick. Anyone who has seriously looked that the current generation x86 virtualization hardware knows that it does not provide clean separation or levels of security. It…

    October 25, 2007
  • The Linux community

    According to Greg’s email, organizations that contributed more than 100 changesets to the recently released 2.6.23 kernel included: Red Hat with 827 changesets (11.7%), IBM with 557 changesets (7.9%), the Linux Foundation with 528 changesets (7.5%), Novell with 449 changesets (6.3%), Intel with 242 changesets (3.4%), Oracle with 158 changesets (2.2%), MIPS Technologies with 143…

    October 18, 2007
  • Distributed shared memory from first principles

    [Update 10/16] What is the fundamental performance limiting factor that has dominated that last 30 years of computer architecture? The obvious answer is the disparity between processor and memory/storage speed. We connect processors to cache, to more cache, to even more cache, to some bus, to memory, to disk/network, suffering costs at each step as…

    October 14, 2007
  • Smart engineering design

    Amy Smith and her work and her student

    October 13, 2007
  • more on missed wakeup

    Here are some conventions [Update: typos fix, Friday] We are concerned with state machines and sequences of events. The prefixes of a sequence include the empty sequence “null” and the sequence itself. Relative state: If “w” is the sequence of events that have driven a system of state machines from their initial to their current…

    October 11, 2007
  • Data structures and algebra

    [Edited 9/10] There’s an easy connection between data structures and basic abstract algebra that may or may not mean anything, but keeps getting rediscovered. I’ve never seen it clearly explained (anyone with a reference or who notices an error in my rusty algebra- please send me a note! A discrete note would be nice -)…

    October 8, 2007
←Previous Page
1 … 33 34 35 36 37 … 45
Next Page→

keeping simple

    • Groundbreaking treatise on state machines, paxos, specification
    • The RTLinux patent 5,995,745
    • Notes on Security and Common Criteria
    • Download code

keeping simple

Proudly powered by WordPress